Please be careful when offering advice to Canadians, especially for the Montreal and Quebec city areas of Quebec. Our winter is much colder and arrives much sooner than the that of the US Northeastern states. In the fall while you still have green leaves on the trees in New York state our trees here are not just multicoloured but already half bare.
So, based on our experience and the advice of the Canadian well known rehabbing facility Hope for Wild Life (based in Nova Scotia) we have developed a protocol for the fall releases.
1. Starting in early September all fall release babies should have a well insulated nest - since by that date the babies will keep this nest for the whole winter.
2. All babies 12 weeks or younger by the end of October should not be released. They have to be overwintered indoors or, if necessary, could be placed outside in a release cage with a very well insulated nest. Food and fresh water must be provided to them every day.
3. All fall release babies will need the food support of their humans for their whole first winter.